Dose effects on the long persistent luminescence properties of beta irradiated SrAl2O4:Eu2+, Dy3+ phosphor

被引：8
|
作者：
Pedroza-Montero, M. [1 ]
Castaneda, B. [2 ]
Gil-Tolano, M. I. [1 ]
Arellano-Tanori, O. [1 ]
Melendrez, R. [1 ]
Barboza-Flores, M. [1 ]
机构：
[1] Univ Sonora, Dept Invest Fis, Hermosillo 83000, Sonora, Mexico
[2] Univ Sonora, Dept Fis, Hermosillo 83000, Sonora, Mexico
来源：
RADIATION MEASUREMENTS | 2010年 / 45卷 / 3-6期
关键词：
Strontium aluminate; Persistent luminescence phosphors; Electron traps; TEMPERATURE-DEPENDENCE; MECHANISM; ALUMINATE; EU2+;
D O I：
10.1016/j.radmeas.2009.12.046
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
The SrAl2O4:Eu2+, Dy3+ is a phosphor characterized by a long persistent luminescence (PLUM) when it is excited with UV-VIS light and ionizing radiation. In this paper, we study the PLUM behavior as a function of beta irradiation dose in the 0-650 Gy range with a fixed dose rate of 5 Gy/min. The PLUM intensity showed a complex decay behavior, exhibiting a near linear response in the 0-1.7 Gy low dose range and gradually increasing up to 160 Gy. The PLUM reached the saturation for higher doses (>275 Gy) with a slight decrease in the range of 300-650 Gy. In addition, a systematic PLUM enhancement was produced after a thermal cleaning procedure and irradiation at RT in a series of 10 cycles. The observed phenomenon may be related to a radiation-induced process of charge trapping accumulation, which is triggered by thermal stimulation during the irradiation stage. It improves the luminescent characteristics of SrAl2O4:Eu2+, Dy3+ phosphors rendering them suitable for permanent display and illumination devices. (C) 2009 Elsevier Ltd. All rights reserved.
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收藏
页码：311 / 313
页数：3
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